Crystal Cal Activated Carbon – 3.5 Gallon, Activated Charcoal for Aquariums and Fish Tanks

This is great value filtering media .it works perfect at removing foul smell from aquarium and water is crystal clear. Clean water - healthy fish

works well in clearing your aquarium water

great product

Simple DIY carbon for making filters myself.

Good value. Not the cheapest, but it's also one of the highest quality, made with lignite and not cheap coconut fiber. Won't cause HLLE in fish. Also can be used in rodi Filter.

After wasting so much $ at the large “P” stores on fish aquarium essentials, starting to get items in bulk. Excellent charcoal.

I bought this as I couldn’t find acid free carbon. I soaked it over overnight in water and baking soda to neutralize the acid. I then dried it in a dehydrator for a few hours. It worked good for lowering the VOCs for my 3D printer.

Works well